v4.1

• Overhauled container based build system
• Splash screen
• run_scaled utility script
• Client:
  • header bar option for window control menu
  • generate a qrcode to connect
  • show all keyboard shortcuts
  • progress bar for file transfers
  • GTK cairo backend support for more native bit depths
  • disable xpra's keyboard shortcuts from the system tray menu
  • automatically include the server log in bug reports
• OpenGL client backend:
  • render at fixed bit depths with the pixel-depth option
  • support more bit depths
• Clipboard:
  • MacOS support for images, more text formats, etc
  • MS Windows support for images
  • wayland clients
• Server:
  • faster server startup
  • xpra list-windows subcommand
  • new window control commands: move - resize, map - unmap
  • remote logging: from server to client
  • support window re-stacking
• xpra top:
  • show pids, shortcuts
  • more details in the list view
  • show speed and quality
• Display:
  • bumped maximum resolution beyond 8K
  • set the initial resolution more easily using the 'resize-display' option
• Encoding:
  • server side picture downscaling
  • libva hardware accelerated encoding
  • NVENC 30-bit accelerated encoding
  • vpx 30-bit
  • x264 30-bit
  • faster 30-bit RGB subsampling
  • scroll encoding now handled more generically
  • black and white mode
• Network:
  • IGD / UPNP
  • SO_KEEPALIVE option
  • clients can be queried and controlled using local sockets
  • specify connection attributes using the connection string
  • nested SSH tunnels
  • websocket header modules
  • specify the socket type with socket activation
  • expose the packet flush flag
  • xpra shell subcommand for interacting with processes in real time
  • custom group sockets directory permissions and name
• Testing:
  • better test coverage
  • cleanup output